How should I make the struct to get this JSON data in SwiftUI?

Question

I am making an HTTP GET request and I want to save the JSON response that looks like this:

{
    "code": 200,
    "status": "success",
    "patients": [
        {
            "_id": "5e77c7bbc7cbd30024f3eadb",
            "name": "Bogdan Patient",
            "username": "bogdanp",
            "phone": "0732958473"
        },
        {
            "_id": "5e77c982a2736a0024e895fa",
            "name": "Robert Patient",
            "username": "robertp",
            "phone": "0739284756"
        }
    ]
}

And here is my struct:

struct Doctor: Codable, Identifiable {
  let id = UUID()
  let patients: [Patients]
}

struct Patients: Codable {
  let id: String
  let name: String
  let phone: String
}

You have to add CodingKeys in both structs to skip id in Doctor and to map _id in Patients. — vadian
– vadian, Commented Mar 27, 2020 at 9:02
And how do I do that? Can you post it in an answer? I am not familiar with CodingKeys. — Susca Bogdan
– Susca Bogdan, Commented Mar 27, 2020 at 9:04
Then you should do some research, maybe read this article from Apple — Joakim Danielson
– Joakim Danielson, Commented Mar 27, 2020 at 9:07

staticVoidMan · Accepted Answer · 2020-03-27 09:12:03Z

1

As per your model, id is expected in the JSON whereas the keyname in the JSON is _id.
You can use CodingKeys to fix this:

struct Patients: Codable {
    let id: String
    let name: String
    let phone: String

    enum CodingKeys: String, CodingKey {
        case id = "_id"
        case name
        case phone
    }
}

CodingKeys creates a map between the keynames in your model and the keynames in the JSON response.
There are other reasons to use CodingKeys but for your current purpose this is enough.

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